Icom: Last form for help ic2720 squeal

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Huntingdeer24

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Mar 30, 2014
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When I power off the radio with it hooked up to the powersupply and powersupply on it squeals threw the speaker.to make it stop I have to cut off the powersupply or turn the radio on.ive tryed many sites but no luck.i did see something about a diode but did not say which one or nothing.its a favorite radio I would hate to let it sit up.thanks
 
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